World of WarCraft: Wrath of the Lich King

With
the opening of the Dark Portal, and the renewed war to stop the Burning
Crusade's destruction of worlds, the heroes of Azeroth have given
little thought to the frozen wastes of Northrend - and the terrible,
ancient powers that wait there. Yet the brooding evils of the fallen
Nerubian empire and their malevolent sovereign have not forgotten
Azeroth…
The former death knight and now Lich King Arthas has set in motion
events that could lead to the extinction of all life in Azeroth, as his
undead armies and the necromantic power of the plague threaten to sweep
across the land. Only the mightiest heroes can survive the frozen
northlands with any hope of disrupting the plans of Arthas -- and
perhaps even challenge the Lich King himself and end his reign of
terror for all time.

New character class: the necromantic Death Knight

New continent: Northrend, the icy domain of the Lich King

New level cap of 80, including mighty new powers and talents

Epic siege warfare and destructible buildings

New profession: Inscription

New character-customization options, new dungeons, and much, much more